Lock.



F. J. WELLISGH. LOOK.

APPLICATION FILED NOV. 12, 1913.

41 Patented Apr. 7, 1914.

I 2 SHEETS-SHEET l.

F. J. WELLISGH.

LOOK.

APPLICATION FILED NOV. 12, 1913. 1,092,414. Patented Apr. 7, 1914.

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4 5' a 4 OI I I O 7 O I J 7 0 l5 1/ o jatl (I- j COLUMBIA PLANOGRAPH co., WASHINGTON, D c.

FERDINAND JOSEPH WELLISCH, OF LONDON, ENGLAND.

LOCK.

Specification of Letters Patent.

Patented Apr. '7, 1914.

Application filed November 12, 1913. Serial No. 800,537.

To all whom it may concern Be it known that I, FERDINAND Josnrri VVELLIsor-I, subject of the King of Great Britain, residing at Golden Cross Hotel, Strand, London, W. G, England, have invented certain new and useful Improvements in Locks; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention comprises an improved safety lock of the type wherein a spring latch bolt is adapted to be retracted by a servant key, while locking mechanism may be operated by a master key.

According to this invention the lock is provided with three mechanisms namely, latching mechanism which may be retracted by a servant key, locking mechanism which may be locked or unlocked by a master key and supplemental locking mechanism which responds only to the secret key the mechanism being so arranged that the secret key is of a greater size than either the master or servant key, so that neither the master nor servant key can be converted into a secret key by filing or cutting away a part of such keys. Such locks are particularly intended for use in hotels on the doors of guests rooms to enable the hotel proprietor to so secure the room door as to prevent an undesirable or payment defaulting guest from reentering the room, and it is the object of the present invention to provide an improved lock of this kind.

Referring to the drawings :Figure 1. is a view of the lock with the outer plate removed showing the mechanism in its normal position, 2'. 6., ready for the servant key to unlock the door. Fig. 2. is a view of the lock showing the mechanism after it has been actuated by the master key. Fig. 3. is a view of the lock showing the mechanism after it has been actuated by the secret key. Fig. 1. is a view of the member operated by the secret key to actuate the secret locking mechanism. Figs. 5, 6, 7 illustrate the servant, master, and secret keys respectively.

In carrying this invention into practice as illustrated upon the accompanying drawings the bolt 1 has the usual inclined latching nose 2 and is advanced by the V-spring 3 located between the rear end of the bolt and the interior of the case 4. This bolt 1 is provided with a recess 5 whereby it may be retracted by either the servant or master key.

'bein The locking mechanism responding to the master key includes spring controlled tumblers 6 which are so arranged that to lock the door the bolt is advanced by the master key so that it projects beyond its normal latching position as shown in Fig. 2, the master key engaging with a recess 7 in the bolt for this purpose. The tumblers (Shave extended openings which permit the latch bolt to be retracted from its normal latching position without being obstructed by the tumblers. A hub 8 is provided having an arm 9 which is carried by a spindle and fitted with a handle not shown, in the usual manner, this arm 9 engaging with two pegs 1O, 10 on the bolt whereby the bolt may be retracted from its latching position by a handle placed upon the interior of the door.

The secret locking mechanism includes two transversely disposed members 10, 11 moving in paths at right angles to the path of the latching bolt. The member 1O travels in guides 12 and carries tumblers 13 responding to the secret key which engages a recess let in the said member 10 and whereby said member is moved. The second member 11 is adapted to engage with a re cess 15 in the bolt when the bolt is in its fully advanced locked position. The member 10 is provided with teeth 16 and the member 11 with teeth 17 which are connected by a small wheel or pinion 18 in such. manner that when the member 10 is moved downwardly, the member 11 moves in the opposite direction to engage with the main bolt.

As will be seen the three keys are all in serted in the same keyhole the smallest key, namely the servant. key being capable only of retracting the bolt against the action of the spring from its latching position. The key next in size namely, the master key controls the locking mechanism in addition to g capable of retracting the latch bolt, while the third and largest key controls the secret locking mechanism. The servant key is intended for use by guests while the door may be double locked or single locked by the hotel oflicials as desired.

hat I claim then is 1. In a lock, the combination of a spring advanced latch bolt adapted to beretracted by a servant key; tumbler mechanism responding to a master key whereby the bolt may be locked in such manner that it can no longer be retracted by the servant key; and

locking mechanism responding only to a third or secret key whereby the bolt may be locked when in its advanced position in such 'manner that it cannot be retracted by either the servant or master key.

2. In a lock, the combination of a spring advanced latch bolt adapted to be retracted by a servant key; tumbler mechanism responding to a master key by which the said bolt may be advanced beyond its normal latching position and retained in its advanced position; a hand actuated hub; a radially projecting arm on said hub engaging the bolt whereby the bolt may be retracted by hand from its normal latching position; a pair of sliding members disposed and operating in a direction at right angles to the path of the lock bolt; tumbler mechanism carried by one of said transversely disposed bolts responding to a secret key whereby the said transversely disposed member is operative, said tumbler mechanism being adapted to pass the master and servant keys without responding tothem; and a toothed wheel engaging teeth on each of the transversely disposed members whereby when the 'one is operative the second one is shifted in advanced latch bolt adapted to be retracted by a servant key; tumbler mechanism responding to a master key whereby the bolt may be locked in such manner that it can no longer be retracted by the servant key; a pair of sliding members disposed and operating in a direction at right angles to the path of the lock bolt; tumbler mechanism carried by one of said transversely disposed bolts responding to a secret key whereby the said transversely disposed member is operative, said tumbler mechanism being adapted to pass the master and servant keys without responding to them; and a toothed wheel engaging teeth on each of the transversely disposed members whereby when the I may belocked in such a manner that it can no longer be retracted by the servant key; a hand actuated hub; a radially projecting arm on said hub engaging the bolt whereby the bolt may be retracted by hand from its normal latching position; a pair of sliding members disposed and operating in a direction at right angles to the path of the lock bolt; tumbler mechanism carried by one of said transversely disposed bolts responding to a secret key whereby the said transversely disposed member is operative, said tumbler mechanism being adapted to pass the master and servant keys without responding to them; and a toothed wheel engaging teeth on each of the transversely disposed members whereby when the one is operative the second one is shifted in the opposite direction so as to engage with the bolt.

5. In a lock, the combination of a spring advanced latch bolt adapted to be retracted by a servant key; tumbler mechanism responding to a master key whereby the bolt may be locked in such manner that it can no longer be'retracted by the servant key; and locking mechanism responding only to a third or secret key whereby the bolt may be locked when in its advanced position in such manner that it cannot be retracted by either the servant or master key.

6. In a lock the combination of a spring advanced latch bolt adapted to be retracted by a servant key; tumbler mechanism responding to a master key whereby the bolt may be locked in such manner that it can no longer be retracted by the servant key; a hand actuated hub; a radially projecting arm on said hub engaging the bolt whereby the bolt may be retracted by hand from its normal position; and locking mechanismresponding only to a third or secret key whereby the bolt may be locked when in its advanced position in such manner that it cannot be retracted by either the servant or master key.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FERDINAND JOSEPH WELLISGH.

Witnesses CHARLES lVnLLIsoH, THEODORE VVELLIsoH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

